Percutaneous balloon-assisted thrombectomy: preliminary in vivo results with an expandable vascular sheath system.
OBJECTIVE
To test an expandable vascular sheath system for percutaneous transcatheter balloon-assisted thrombectomy in vivo.


METHODS
A 9-F expandable vascular sheath system was used. The system consisted of a sheath with a deployable funnel configuration and a 3-F balloon catheter used coaxially. Thrombus was created in the inferior vena cava of 24 rabbits. Thrombus with a mean weight +/- 1 standard deviation of 1,028 mg +/- 67 was removed percutaneously with the expandable sheath system at 2 days (n = 16) and 7 days (n = 8) after formation; 7-day patency was examined after removal of 2-day-old thrombus (n = 8). Histologic examination was performed in the inferior vena cava.


RESULTS
In all cases of 2-day-old occlusion, complete patency of the inferior vena cava was achieved. In cases of 7-day-old occlusion, patency could be completely restored in four (50%) cases; in two (25%) cases each, there was partial removal or no thrombus could be extracted. Histologic findings were comparable with those observed after balloon embolectomy.


CONCLUSIONS
Percutaneous transcatheter balloon-assisted embolectomy is feasible with the expandable vascular sheath system.
Brossmann
J
J
Department of Diagnostic Radiology, Christian-Albrechts-Universität Kiel, Germany.
Bookstein
J J
JJ
D000818:Animals; D002404:Catheterization / Q000295:instrumentation; D004867:Equipment Design; D011817:Rabbits; D011859:Radiography; D017131:Thrombectomy / Q000295:instrumentation* / Q000379:methods; D013927:Thrombosis / Q000000981:diagnostic imaging / Q000601:surgery*; D013997:Time Factors; D014654:Vascular Patency; D014682:Vena Cava, Inferior